#include<iostream>
#include<cstring>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<map>
#include<set>
#include<vector>
#include<queue>
#include<cstdlib>//rand()
#define rep(i,a,b) for(register int i = (a);i <= (b);++i)
#define per(i,a,b) for(register int i = (a);i >= (b);--i)
typedef long long ll;
typedef unsigned long long ull;
using std::string;using std::cin;using std::cout;

int T,k,n;

int main(){
    std::ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    //freopen("in.in", "r", stdin);
    cin >> T;
    while(T--){
        cin >> n >> k;
        if((n & 1) == (k & 1) && 1ll * k * k <= n) cout << "YES\n";
        else cout << "NO\n";
    }


    return 0;
}